These arrived yesterday afternoon. I got a great deal on them on Amazon. A seller from Maryland had open box - like new for $1199 with Prime shipping and no sales tax. I had $75 in gift cards so only $1124 total. I put them on immediately and was extremely underwhelmed. I've read through this entire thread so I was expecting this and left Spotify on overnight and all day so far to let them burn in a bit. I just put them on and holy fucking SHIT these really opened up. Bass was distorted and blown out yesterday--especially sub-bass--and treble was harsh. Today, the treble is under control but so revealing and detailed and the bass has really smoothed out. I cannot believe the extension these have compared to the HD6XX. I know everyone's said it but it's one of those things you just can't know until you experience it. I was really regretting the purchase yesterday because the bass was so bad but I think it's perfect now. I am so pleased with these headphones. I've already heard some new stuff in the few NIN songs I've already played and I can't stop smiling like a goon about it. Next step: Mjolnir 2 and then I think I can finally stop chasing the dragon.